1,2-Dichlorobenzene → 3-(2-chlorophenyl)-1-methyl-5-[4-methyl-3-(5-trifluoromethylpyridine-2-yloxy)phenyl]-1H-1,2,4-triazole

HRID 52236Notes

Reaction equation

HRID 52236 reaction equation
[CH3:1][N:2](S(C1C=CC(C)=CC=1)(=O)=O)[N:3]=[C:4](Cl)[C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[Cl:11].[CH3:23][C:24]1[CH:31]=[CH:30][C:27]([C:28]#[N:29])=[CH:26][C:25]=1[O:32][C:33]1[CH:38]=[CH:37][C:36]([C:39]([F:42])([F:41])[F:40])=[CH:35][N:34]=1.ClC1C=CC=CC=1Cl>C(Cl)(Cl)Cl.[Fe](Cl)(Cl)Cl>[Cl:11][C:6]1[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=1[C:4]1[N:29]=[C:28]([C:27]2[CH:30]=[CH:31][C:24]([CH3:23])=[C:25]([O:32][C:33]3[CH:38]=[CH:37][C:36]([C:39]([F:41])([F:42])[F:40])=[CH:35][N:34]=3)[CH:26]=2)[N:2]([CH3:1])[N:3]=1

Participants

6

Reactant 3

HCID 72391,2-DichlorobenzeneHCID 214636454-Methyl-3-(5-trifluoromethylpyridine-2-yloxy)benzonitrileHCID 53748702N-methyl-N-(p-toluenesulfonyl)-2-chloro-benzohydrazonoyl chloride

Product 1

HCID 214636433-(2-chlorophenyl)-1-methyl-5-[4-methyl-3-(5-trifluoromethylpyridine-2-yloxy)phenyl]-1H-1,2,4-triazoleYield 36.5%

Reagents, catalysts & solvents 2

HCID 24380Iron chloride (FeCl3)CatalystHCID 6212ChloroformSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of N-methyl-N-(p-toluenesulfonyl)-2-chloro-benzohydrazonoyl chloride (1.1 g), 4-methyl-3-(5-trifluoromethylpyridine-2-yloxy)benzonitrile (1.00 g), anhydrous iron (III) chloride (0.60 g) and o-dichlorobenzene (5 ml) is stirred at an oil bath temperature of 140° C. for 30 minutes. After cooling, it is dissolved in chloroform (100 ml) and washed with dilute hydrochloric acid, dilute aqueous solution of sodium hydroxide and saline. Then, it is dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The concentrate is purified by silica gel column chromatography using mixed solvent of hexane-ethyl acetate as eluent to give 0.50 g of desired compound.

Workup

  1. temperatureAfter cooling
  2. washwashed with dilute hydrochloric acid, dilute aqueous solution of sodium hydroxide and saline
  3. dry with materialThen, it is dried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe concentrate is purified by silica gel column chromatography
  6. additionusing mixed solvent of hexane-ethyl acetate as eluent

Sources & evidence

ORD record
ord-63c27b2dcf364dcc92fa0883e791af16
Source dataset
uspto-grants-1997_04
Patent number
US05616594

Reaction notes

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